Electrical relay.



.E` E. CLEMENT.

ELEGTRGAL RELAY.

APPLIUATION ULEB' DB0.23,1905.

9990325 Patented Apr. 18, 1911,

2 SHEETS-SHEET 1. @Il

wi Tumbes n l Y EZ B. CLEMENT.

ELECTRICAL RELAY.

APPLICATION FILED DB0.23,1905.

990,032. v PatenaApr. 18,1911.

2 SHEETS-SHEET Z.

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Referring to the giires, A is an electromagnet "colmplrisin @Erica [inhuman n, CLEMENTQCEtvA'sHrNGrN, nrs'rfnrcr or COLUMBIA, Ass'renon To 'ma nonrfrr ELECTRIC/,contraria or cLnvnLAivr'i, 7omo,Ahcoitr'ortaaroir or oHIow i Be it known tha t I, EDWARD E. CLEMENT,

"abitizgen'lofthe VUnited States, residing at *VVash'ingtoin iiiftlfie District of Columbia, f liave invented certain' 'new and useful Im- 'fproveine'nts in Electrical Relays, of which fthe `4ifol'loWing'is-11aE specification, reference fbeiingtliad` therein to the accompanying daamggw y* ,My-finvention-relates to electrical relays "f ai'id`-."'has-E fori-tsl'object the provision of a relaysuitablefor use in certain types of tele- 'Qphneeicliangefsysteins as Well as in other sy'sten'is; -requiringf multiplicity of contactsto be i'iiadeand broken.

.a Heretofoi'e ithas'been diiiiciilt to design "fa relay "Whi'ch'ivou'ld make 'and breakl more .than one or tivo' pairs of contacts satisfactorilyfaiid so fafras I know it has never been Ossible toliavefanordinar rela Workin@r i, i 7 n y1in'theordinair 'i Way as such directly control "principal-reason yfor this has lain in the #considerablelnuinber `of circuits. .The

``diiiiciilty of vadjusting ymany contacts so v"o'r breakfthem all satisfactorily. "inight" 1make andotliers not, and vice to the present invention I make jtliei'n*` a'llineed fnot be adjusted to them, but

ythey adjust-tlieinselves individually to it as *five/ll asfto each other.

. i pan'ying idra'wi'ngs'fin Which- 'the inclosing shelllinsection, Fig. `2 is a top "Certain advantages will appear in details 'of "construfctioi'i,4v as I proceed with my description, 'and tliev 'claims appended thereto.'

My invention is illustrated in theacconi- 'Figure 'lisa side View -of the relay With plan viewoffthe saine with the shell reand-fina.

rnovedfFigl Bfis a'lfront View xof the same, n g ,42 is a :rear vieW with the back plate ren'iov'ed* f' a pair of spools a-a,

Y 4vturn porti carryingthecontact springs; The ends of'v the cores, 'being-'reduced so as .to lmake shoul' ELECTRICAL RELAY.' .y

,seriali Np. 293,149.'

l. .i ,4 Specification of Letters Patent. Y Patented JAljlgs, 1911. Application mea December 23, isos.

ders toabut against the back plate, project through the saine beyond the nuts a4 a sufficient distance to enable them to be used to secure the entire structure upon the usual frame or rack. Upon the yoke, and cover-' ing the entire back of the magnet structure is an Vinsulating back plate or base B flanged around its edge, and serving to 'receive and support the shell or cover C, which incloses the entire structure Within a dust and moisture-proof chamber. This shell is formed or drawn up out of sheet metal, continuous exceptl for the open mouth, and is slid over the relay from the outer end until its edges engage the` back plate B'.

Across the front of the electro-magnet is a second yoke a having aA return portion or flange a? extending across the front end and Von top of the electro-magnet. I may state here that the rear yoke a3 is of soft iron, and the front yoke a7 is preferably of brass. In case quickness of action is desired in the relay this brass is slit between the tivo polepieces, and` radially around them, as Well understood in the art, iii order to prevent eddy currents, and consequent magnetic retardation.

-Mountedupontlie flange a5 at the rear of the magnet are the contact springs S, conipr'ising individual members s s s2 s3, The springs are separated by the insulating strips st 85 s and 87, and are secured to the flange a by the through bolts s Wlioselieads rest on the metal cap plate 'or strip S8. These springs are in sets, those shown in Fig. l constituting one complete set. In the use to which I apply this relay at present, that' of cutting on ,a metallic circuit to its eXten- 'sions, it is requisite to have two pairs of contacts, one pair for each side of the metallic circuit' in each set. Both of `these are -niade and brokengat once,l andth'ere may be vas manysets as vthere are circuits to becontrolled. In each set the .springs s and s2 are the movable or vvorkinbsprings, and the', springs t s .33 ,are the Xed or anvil formed in the springs. As shown in Fig. l l make all these springs self-adjusting by a very simple expedient, that is -by the use of two little studs sm and s, one Jfor each pair. The stud s rests with its base in a notch Z2 tiange CZ, as nearly as possible over the pivot edge of the armature. lts `educed portion or stem extends through a hole in the spring s, and supports upon it the spring s. The stud si@ has its base rest ing on the spring .s and its reduced portion or stein extending through a hole in the spring .s2 and supporting upon it the spring s3.. The bases .ot all the studs s in the sets of springs across the top ot the relay lie within the notch LZ2, which is a channel or gain cut across the arm (Z from side to side, the armature being thus held in place by the springs and studs, without other tastening means.

A rod a which extends outwardly from the voke a passes through a hole in the armature Y) and is threaded at its end to receive a nut. a." whereby the air gap between the armature and the core may be adjusted. This rod serves also to prevent lateral displacement ot the armature and to secure the inelosing shell in place by, the nuts all.

At a point near the end of the [iange tZ, in F ig. 1, another notch is cut across the face from side to side, and in this notch rest the bases ot the operating studs s, which howevercan rest on the flat surface ot the armature arm, without the notch. Each stud is shouldered, and. its stem or reduced portion passes up through holes in the springs s--a into contact with the under side of spring s2. The springs s-s2 rest therefore upon the shoulder and the top respectively ot the studs s, and .when the armature is tilted by having its arm d awn into the poles of the magnet, all the studs su are' lifted, lifting all the springs .se-s2 into contact with their companion springs s--s3. By noting the shape and arrangement of the studs. it will be observed that each set of springs is selt-adjusting` all the springs having a downward setor tendeney toward the magnet.

It is not absolutely necessary to use a pair ot electro-magnets in the manner illustrated. as a single spool, with an iron return circuit over its top might do the work. I prefer the pair however as the operation is much more certain, and the magnetic circuitis shorter.

Having thus described my invention, what I claim and desire to secure by Let-ters Patent isl. An electrical relay comprising a pair of electro-magnets having their' cores united at their rear end, an L-shaped supporting yoke carried upon the front end of the cores, a bent armature pivoted on the angle of said supporting yoke and having a depending portion extending in front ot and across the ends otthe lcores, and a substantially horizontal portion extending. over the tops of the magnet spools, and a plurality of contact springs secured upon the rear yoke of the electro-magnets and extending forward with their .ends resting over and adapted to be controlled by the horizontal portion of the armature, substantially as described.

An electrical relay comprising a pair of electromagnets having their cores united at their rear end, an L-shaped supporting yoke carried upon the Aliront end of the cores, a bent armature pivoted on the angle ot said supporting yoke and having a depending portion extending in front ot' and across the ends of the cores, and a substantially horizontal portion extending over the tops of the magnet spools, and a plurality 'of contact springs secured upon the rear yoke of the electro-magnets and extending forward with their ends resting over and v'adapted to be controlled by the horizontal portion of the armature, together with means whereby the springs may hold the armature in its place, substantially as described.

3. An electrical relay comprising the following instrumentalities: a pair of cores carrying windings, a magnetic yoke across the rear ends ot' said cores, a return portion on said yoke extending over the tops of the windings, an angular rigid support carried upon the 'front endsoit the coresr` a broad armature bentsov as to have a dependent portion extending across and in front ot both cores and a horizontal operating portion extending completely across and overlying the magnet windings, said armature tulcrumed upon the angle of said rigid support, and a plurality of sets of contact springs having relatively fixed and movable men'ibers in each set, individual means for maintaining the relative adjustment in each set and tor maintaining individual engagement ot the working members and the armature, together with means to retain the armature against displacement, substantially as described.

-l-. Ain electrical relay structure comprising the following instrumentalities: a pair ot cores carrying windings, a magnetic yoke across the rear ends of said cores, a returi portion on said yoke extending over the tops ot' the windings, an angular rigid support carried upon the front ends oit the cores, a broad armature bent so as to have a dependent portion extending across and in front ot' both cores and a horizontal operating portion extending completely across and overlying the magnet windings, said angular armature t'ulcrumed upon the said rigid support, and a plurality ot sets of contact springs 'having relatively movable members in each set,

fixed LLLLLL individual maintaining the relative relation thereof,

means for maintaining the relative adjustment in each set and for maintaining individual engagement of the working members and the armature,- the contactpoints of all the sets of springs extending forward beyond the operating and adjusting means so as to be entirely unobstructed and visible from the front of the relay,

v5. An electrical rela-Iy comprising a pair of parallel cores united-at their .rear ends by a magnetic yoke having a return portion extending across and parallel to the cores,

connected windings upon said cores, an ang gular armature supported upon and extending across the front ends of both-cores, a plurality of sets of contact springs secured upon the return portion of the rear-yoke and extending forwardly parallel with the cores into positionto be engaged and operated by the armature, and means whereby said springs will hold the armature against lateral displacement, substantially as described.

6. In an electrical relay comprising an electromagnet, a rear yoke or support, a front support, both carried on the core, contact springs secured upon the rear yoke and extending forwardly over the front support, an angular armature carried directly on the latter, and normally with one member lying flat thereon and the other extending down in front of the core end, and operating means' for the springs engaging the armature and it positively against longitudinal displacement, substantially as described.

7 .y An electrical relay having a core, ...a yoke, contact springs and a bell crank armature, a support for the armature, operating studs for the springs, and vmeans whereby said studs will positively engage one member of the armature and hold the same normali f -flatupon the support against longitudinal displacement, substantially as described.

8.'An electrical relay having a plurality 'of Contact springs, an angular armature with a portion underlying the springs to operate the same, said portion being partly cut away to form an opening or openings, and studs for operating the contactvsprings removably seated in said openings and positively engaging the springs to communicate motion thereto from the armature, substantially as described. j 9. In an electrical relay, an electro-magnet, a broad armature for the same, a plurality of sets of contact springs resting thereover, each set of springs having a plu ality of pairs of springs and resting and adjusting studs, one for each pair of springs,

and one or more operating studs carried by the armature and also engaging the working substantially as described.

yand an armature for substantially as de- Vcombination of the following instrumentalities: a base or support, an electromagnet with parallel cores and windings and an end yoke connected to said base, an armature mounted over and extending across the coreends of the magnet, contact springs adapted to be worked by said armature, a shellv adapted to inclose the entire structure, and securing means comprising a rod extending between the magnet cores and windings, at one end secured to the base and at the other adapted to pass through openings in the armature and shell and threaded to receive 'a clamping nut on the outside of the latter.

12. In an electrical relay, the combination with an electromagnet, contact springs operating the same, of means for securing an inclosing shell over said magnet which comprises a threaded rod and a clamp nut, and means carried by said securing means for adjusting the air gap of the armature, substantially as described.

13. In an electrical relay, the combination withan electromagnet, contact springs and an armature for operating the saine, of means for securing an inclosing shell over said magnet which comprises a threaded rod and a clamp nut, and a nut threaded upon said rod adapted to engage the armature whereby the air gap between the core and the armature may be adjusted, substantially as described.

14. In combination, a relay, an inclosing shell therefor, and means Afor securing the same over the relay comprising a i'od extending through an opening in the armature of the relay and through the face of the shell and provided with nuts for holding said shell rigidly in position, said rod also preventing lateral displacement of the armature of said relay.

In testimony whereof I aiiix my signature in presence of two witnesses.

EDVVARI) E. CLEMENT.

Witnesses:

E. EDMoNsroN, Jr., JAMES H.,MARR. 

